A 200-V, 100 A armature full-load line current, 1000 RPM, shunt DC motor is consideredin this problem. Its characteristics are given below:RA -0.20 2RF = 50 52This motor has compensating windings and interpoles.The magnetization curve for this motor at 1000 RPM is shown in a tabular form below:NF = 2000 turnsIf, A 0 0.1 0.2 0.4 0.5 0.6 0.8 1.0 1.2 1.6 1.8 2.0 2.2 2.4EA, V 6.0 25 50 100 135 160 205 235 255 275 285 288 290 291For Radj between 50 52 and 4502, find the range of no-load speed of this motor.Answers: Enter the low range speed first and the high range speed next.The range of speed is between:andRPM

Answered: Image /qna-images/answer/459bdc19-1507-4ff2-9a01-aa5eed636655.jpg

Answered: A 200-V, 100 A armature full-load line…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Q1 Describe the Characteristics, characteristics, efficiency calculations, their applications Of DC Motors in detail
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23. As load is increased from no load to full load on a 3-phase squirrel-cage induction motor, what happens to the ..
For a 18600W 2400rpm DC motor, the following values are given: Ra = 0.089 2 (value at room temperature (250C)), La = 0.00144 H, KT = 0.85 Nm / A and KV = 0.851 V / (rad / s)), (In calculations Use the hot resistance values at 1000C.) (Take the rated field winding losses as Wf= 210W.) If this DC machine is operating as a motor with rated flux at rated speed, calculate the rated torque (TR), rated current (IR), rated voltage (VR), efficiency (n) at the rated point, taking into account the winding losses. Find the speed (@NL) of this motor in no-load condition. TR Nm IR А VR V Eff = % ONL= rpm
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A 200 V dc shunt motor takes a current of 20A on a certain load. R= 12 and Rah= 2002. Find the resistance to be inserted in series with the armature to reduce the speed to 75% of its original value if the load torque is constant.
A DC shunt motor is producing EMF of 220V running with 500rpm. And producing EMF of 200V with the speed of 1000rpm by adding external resistance with shunt field resistance. The original shunt field resistance is 250 ohm.Find the external resitance added resistance with shunt field resistance at 1000rpm. a. 300 ohm b. 250 ohm c. 500 ohm d. 550 ohm
A 200-V, 100 A armature full-load line current, 1800 RPM. hunt DC motor is considered in this problem. Its characteristics are given below: RA=0.20 52 RE 50 $2 NF-2000 turns This motor has compensating windings and interpoles. The magnetization curve for this motor at 1800 RPM is shown in a tabular form below If.A 0 0.1 0.2 0.4 0.5 0.6 0.8 1.0 1.2 1.6 1.8 2.0 2.2 2.4 EA-V 6.0 25 50 110 135 160 205 235 255 275 285 288 290 291 For Rad between 50 52 and 450 2. find the range of no-load speed of this motor. Answer: No-load Speed Range from RPM to RPM.
-A 250V, DC series motor has total resistance of 0.8 Q. Its full load current and speed are 10 A and 1500 r.p.m respectively. If the torque is reduced to 50% .Determine the current and speed. Assume straight line magnetization characteristics.
A 240V , Shunt DC - motor delivers power to a load at 1200 Rev / Min . The load Torque drawn by the motor is 320 N.m. The armature %3 resistance is 0.3 Ohm and the field resistance is 100 Ohm and the rotational losses are 500W. a. What are the armature current and the efficiency ? b. If the torque decreased to be 250 N.m find the speed !
A 500 V DC shunt motor takes 4 A at no-load. The shunt field winding resistance and the armature winding resistance are 250 and 0.2 respectively. Find the efficiency when the motor draws a current of 10 A at full load.
A wound-field DC motor has an armature resistance of 0.50 0 and a mechanical loss torque of 1.0 Nm at full-load speed. The armature voltage is 240 V and the no-load speed of the motor is 2500 rpm. If at full-load the shaft torque is 60.0 Nm and the field flux is reduced by 5% at full-load, determine: (i) The value of Kø,, where K is the armature constant and of is the field flux, at no-load and full-load. (ii) The full-load armature current. (iii) The full-load motor speed. (iv) The full-load efficiency of the motor if the power lost in the field winding is 100 W.

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